RTC help

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6

i have a relay that cuts in if the temp gets below 25 degrees, if it is fluctuating between 25/24.9 the heater will cut in and out every second. i normally set this to a higher value.

use 2 temperatures to prevent this behaviour.

pseudocode:

int state = LOW; // sort of OFF

void loop()
{
  float temp = readTemperature();

  if (temp > 25) state = LOW;
  if (temp < 23) state = HIGH;

  setHeater(state);
}